Welcome to Blog. I post about my DIY (do it yourself) activity, Photography & Astronomy.
The main reason for DIY is not about saving money, to gain knowledge, handling of tools,
new skills, and the enormous feeling of satisfaction that comes from building your own
equipment. This is worth far more than money. DIY for the fun of creation,to learn, or to get
something that can't be bought & tweaking to your taste.

Saturday, January 5, 2013

Rear Projection Solar Telescope

Dark regions on the solar surface appear in generally predictable patterns and locations, growing larger over a few days to a few months and then fading away. Sunspots develop where high concentrations of magnetic field inhibit the flow of energy, producing cooler regions compared to surrounding areas. This is a useful scope for schools & colleges for Astronomy presentations. Projection method is safe & effective way to enjoy sun's features. In this project i have used 60mm achromatic doublet lens with 25 mm metal eyepiece. Scope has a 3 inch by 3 inch secondary mirror. Casing is made of 25 & 12mm rubber wood. Lens is housed in a 70mm Aluminum tube. Here the image of the sun is projected on a white plastic sheet.

1 Comments:

Hello AnilCongratulations,very nice and clever.Looking forward for your ATM achievements.To improve the contrast maybe you will want to add a hood on a hinge on the upper side and with triangular sides.Like the ones used on XIX Century camera obscura.It is stated that hinged hood/cover is improving twice the contrast.